If you guys aren't using professional software, there's really no benefit to have a 95% gamut vs a quality 60%.
That said, no, the MBP 17 is not 95%.
Both screens compared to 60%.
MBP 15 hi-res ag:
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MBP 17 glossy;
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Very similar color spectrum coverage. It's a quality 60% screen (albeit technically, it's closer to 72%) which is very good for non-professional use. It's actually safe to say it's BETTER than 95% gamut screens for everyday use because of misinterpretations that sometimes occur with higher gamut screens operating under tradition RGB specs (e.g. blues end up looking more magenta).
But for photoshop use, a 95% screen is better. An IPS is another step up from there.
Also, just because they're the same manufacturer doesn't make them the same quality. LG, Samsung, Hannstar, and Chi Mei are examples of LCD suppliers. They produce quality screens, and garbage screens; more over, I'm pretty sure Apple utilizes multiple LCD suppliers anyway (I know for a fact they use both LG and Samsung) that makes the first comment even less true.